These pouches are 5mil thick nylon and feature a 3-sided seal. They can be sealed with any quality heat sealer. Always make sure your heat seal gives plenty of room for the laboratory to re-seal the bag after the substance is tested.

IMPULSE HEAT SEALER FOR VAPOR LOK BAGS

The Vapor Lok Heavy Duty Barrier Pouches also bode a combination of films with ideal barrier properties. This can protect from potentially dangerous gases that may “leak” through the bag, such as PCP or methamphetamine. Scientific tests have shown that chemicals and gases from controlled substances are capable of breaking down or altering the packaging they’re in over time. With a thickness of 5ml (as opposed to the normal 3-4ml bag) this bag is less likely to be broken down by the substances it contains.

Also important is the airtight seal it creates, therefore eliminating the smell of controlled substances that can plague police vehicles, evidence processing rooms and evidence storage rooms for days or even months. The one caveat to this is that wet or fresh plant material should be dried before being placed into a nylon or air-tight package. This prevents mold or deterioration of the substance.

There is no need to worry about paraphernalia puncturing the Vapor Lok Heavy Duty Barrier Pouches from the inside, or other evidence stored nearby puncturing the pouches from the outside, as these pouches are puncture resistant, as well as tear resistant. This removes any cross-contamination concerns.

BALANCE FOR WEIGHING CONTROLLED SUBSTANCES

Another task that can be made difficult with collecting controlled substances is weighing them prior to submitting them into evidence. These pouches make it simple to weigh the items contained in them, without having to remove the substances and expose the individual to any hazards.

Make sure that the evidence you are collecting closely fits the size of the pouch you are using. This keeps any evidence from being inadvertently lost. For example, electrostatic charge causes powder to cling to plastic surfaces. If the powder is placed in a container that is too big, it can cause the powder to disperse and it is harder to gather from a larger bag when being removed for testing.

The Vapor Lok Heavy Duty Barrier Pouches come in sizes 4” x 6”, 6.5” x 8”, 8” x 10”, 8” x 12”, 12” x 16” and can be purchased in packs of 100 or cases of 1000.

References:
https://oag.ca.gov/sites/all/files/agweb/pdfs/cci/...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC61971...